扭曲的金属氨基酸纳米带:从分子到框架的奇拉性转录
Chao Li1, Ke Deng, Zhiyong Tang
1Laboratory for Nanomaterials, National Center for Nanoscience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, China.
Journal of the American Chemical Society
|May 27, 2010
概括
氨基酸如氨基酸的奇拉性决定了银协调聚合物的自我组装. L-氨酸产生右手螺旋纳米带,D-氨酸产生左手螺旋纳米带,DL-氨酸形成无螺旋纳米板.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 生物化学 生物化学
背景情况:
- 生物协调聚合物是由金属离子和生物分子组成的材料.
- 奇拉性或"手性"是生物系统和材料科学中的一个基本性质.
- 了解性在自我组装中的作用是设计新型纳米结构的关键.
研究的目的:
- 研究氨基酸性对银 (I) /氨酸 (Ag (I) /Cys) 协调聚合物的自我组装的影响.
- 阐明分子性和由此产生的纳米结构的性和维度之间的关系.
- 提供关于金属有机框架中性转录机制的见解.
主要方法:
- 使用L-氨酸,D-氨酸和DL-氨酸合成Ag (I) /Cys协调聚合物.
- 用各种分析技术对自组装产品进行表征.
- 密度函数理论 (DFT) 模拟,以建模自组装过程,并了解性转移.
主要成果:
- Ag ((I) /L-Cys自组装成纯正的右手螺旋式纳米带.
- Ag(I) /D-Cys自组装成纯左手螺旋式纳米带 (L-Cys产品的镜像).
- 种族性Ag ((I) /DL-Cys形成了一个独特的产品:二维的Achiral纳米片.
- DFT模拟证实了氨酸的分子性决定了格子扭曲,控制了组装性和维度.
结论:
- 氨酸的分子性直接转化为Ag (I) /Cys纳米结构的宏观性和维度.
- 这项研究表明,在金属有机框架自组装中,性转录有一个明确的机制.
- 这些发现为设计和控制纳米超结构中的性提供了先进应用的途径.
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